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The L76 is derived from the LS2, ... It has a 10.8:1 compression ratio and produces 332 hp (248 kW) at 5100 rpm and 367 lb⋅ft (498 N⋅m) at 4100 rpm.
The L69 features a compression ratio of 9.5:1 and a relatively aggressive stock camshaft. It also uses a performance-tuned CCC ECM/PROM, a knock sensor, a performance-tuned E4ME 750 cu ft/min (21 m 3 /min) Rochester Quadra-Jet 4 barrel carburetor, and a special, free-flowing exhaust system with large diameter exhaust manifolds, Y-pipe and ...
L76 350 CID Pontiac "H.O." V8 320 hp (239 kW) W66 ... The compression ratio was also lowered for many engines to accept more environmentally friendly low-leaded fuel ...
For example, if the static compression ratio is 10:1, and the dynamic compression ratio is 7.5:1, a useful value for cylinder pressure would be 7.5 1.3 × atmospheric pressure, or 13.7 bar (relative to atmospheric pressure). The two corrections for dynamic compression ratio affect cylinder pressure in opposite directions, but not in equal strength.
The very modest cam, combined with a low-compression ratio of 8.4 (advertised) and 7.9:1 actual resulted in 290 hp (216 kW) SAE NET. The initial press cars that were given to the various enthusiast magazines (e.g. HOT ROD and CAR AND DRIVER) were fitted with the Ram Air IV-spec camshaft and functional hood scoops - a fact that has been ...
Although the factory advertised L88 rating was 430 bhp at 4,600 rpm, the true rating was said to be about 560 bhp at 6,400 rpm. The very high compression ratio required 103-octane racing fuel, which was available only at select service stations. Clearly this was not an engine for the casual motorist.
Fuel injection and a 10.4:1 compression ratio help contribute to a max power output of 270 kW (362 hp) at 5,700 rpm, and a max torque of 530 N⋅m (391 lb⋅ft) at 4,400 rpm for vehicles equipped with the manual. Automatic cars make 260 kW (349 hp) at 5,800 rpm and 517 N⋅m (381 lb⋅ft) at 4,400 rpm.
It has a 10.2:1 compression ratio, Sequential multi-port fuel injection, and a bore and stroke of 94 mm × 85.6 mm (3.70 in × 3.37 in). Lower-powered versions only have variable cam phasing on the inlet cam (LE0). Selected models also include variable exhaust. The engine weighs 370 lb (170 kg) as installed.